Abstract: The present invention relates to a three-piece wrench comprising: a wrench body with a working head and a shaft, the working head is located at a front end of the shaft, the shaft has a length; a first extension rod with a length; and a second extension rod with a length; the lengths of the first extension rod and the second extension rod are greater than the length of the shaft; combination of the wrench body, the first extension rod and the second extension rod provides various usage lengths of the wrench, so that different connection types can be used to form required lengths according to requirements.

Abstract: A device for detecting the movement of object in images includes a weight determination circuit, an image blending circuit, and an object movement detection circuit. The weight determination circuit determines multiple weights according to an input image and a background image, each weight corresponding to a pixel position. The image blending circuit blends the input image and the background image based on the weights to generate an updated background image. The object movement detection circuit performs a sum of absolute difference (SAD) calculation, block by block, with the input image and the background image or the updated background image to generate a moving object indication data. The object movement detection circuit generates an object movement signal according to the moving object indication data and at least one threshold. Each block contains multiple pixels.

Abstract: A handle of a hand tool includes a main body with a front annular portion, a gripping portion, and a tail portion. The gripping portion has a first expanded section and a reduced section. The outer diameter of the first expanded section, whose front end is connected to the front annular portion, is increased rearward. The outer diameter of the reduced section, which is connected to the rear end of the first expanded section, is reduced rearward. The tail portion has a second expanded section and a closure section. The outer diameter of the second expanded section, whose front end is connected to the rear end of the reduced section, is increased rearward. The outer diameter of the closure section, whose front end is connected to the second expanded section, is reduced rearward. The junction between the reduced section and the second expanded section forms an annular recess.

Abstract: A rotary fastening device includes a rotating axial member and an inertia member. The rotating axial member includes a base body, an input end, an output end and an engaging portion. The input end is disposed at one end of the base body and selectively connected to a wrench. The output end is disposed at the other end of the base body. The engaging portion is disposed on the base body. The inertia member is detachably connected to the rotating axial member, and includes a gravity portion and an engaging hole. The gravity portion is extended toward the output end of the rotating axial member so as to form an annular space. The engaging hole is communicated to the annular space.

Abstract: A MRAM circuit structure is provided in the present invention, with the unit cell composed of three transistors in series and four MTJs, wherein the junction between first transistor and third transistor is first node, the junction between second transistor and third transistor is second node, and the other ends of first transistor and third transistor are connected to a common source line. First MTJ is connected to second MTJ in series to form a first MTJ pair that connecting to the first node, and third MTJ is connected to fourth MTJ in series to form a second MTJ pair that connecting to the second node.

Abstract: A socket includes a socket body, a teeth structure, and a stopping structure and is engageable with a tool member. The socket body has an opening and an inner wall. The teeth structure is disposed on, and along the circumference of, the inner wall of the socket body and includes alternating inner teeth and concave portions. The stopping structure is disposed on, and along the circumference of, the inner wall of the socket body, is farther away from the opening than is the teeth structure, and includes a through hole and an inner surrounding wall. The through hole corresponds to the opening and is surrounded by the inner surrounding wall, which has a thickness. The distance from each concave portion to the hole wall surface of the through hole is defined as a stopping distance to be considered in relation to the thickness of the inner surrounding wall.

Abstract: A socket includes a socket body, a detent rod, and a pushing element. The socket body includes an opening, a teeth structure disposed on, and along the circumference of, the inner wall of the socket body, and an abutting structure farther away from the opening than is the teeth structure and including a first and a second through hole. The first through hole penetrates two sides of the abutting structure and is perpendicular to the axial direction of the socket body. The second through hole is at the center of the abutting structure and communicates with the first through hole. The detent rod is movably disposed through the first through hole and has a diminishing portion that tapers from two ends of the detent rod toward the center. The pushing element is movably disposed through the second through hole and has one end abutting against the diminishing portion.

Abstract: A C-clip includes a C-shaped clip body and two peripherally open holes. The clip body can be opened and closed elastically. The peripherally open holes are provided on two lateral sides of the clip body respectively and are adjacent to or located at the two ends of the clip body respectively. The peripherally open holes are provided in the clip body and each have a communication opening and a closed end. A wall between the communication opening and the closed end of each peripherally open hole forms a stop edge for preventing a tip of a retaining ring plier from moving out of the peripherally open hole. The outer diameter of the clip body can be changed by applying forces to the clip body via the peripherally open holes respectively. As the clip body does not have any particularly protruding portion, the C-clip can be used in various situations.

Abstract: A ratchet wrench allowing easy change of rotation direction includes a main body, a ratchet gear, a pawl, a sideways pushing member, and a direction changing device. The main body has a shaft connected with a head portion. The head portion has a receiving chamber housing the ratchet gear, the pawl, and the sideways pushing member and connected to a channel in the shaft. The direction changing device has a rotating rod in the channel, a sideways pushing button for rotating the rotating rod, an engaging member at the rear end of the sideways pushing member, and an engaging groove at the front end of the rotating rod and engaged with the engaging member, which is axially offset from the rotating rod. The rotating rod can rotate the sideways pushing member and thereby displace the pawl so that a different portion of the pawl meshes with the ratchet gear.

Abstract: The present invention provides an extendable wrench comprising: a wrench having a head portion and a shaft connected to a rear end of the head portion; an insertion hole recessed at a rear end of the shaft; a cover to dismountably close the insertion hole; an extension rod with a front end formed with a plug to be plug-connected with or separated from the insertion hole of the wrench; and an elastic positioning member provided between the plug of the extension rod and the insertion hole of the wrench, when the plug of the extension rod is plug-connected with the insertion hole, the elastic positioning member keeps the plug in position. Thereby, the wrench can be operated independently; when application of larger operating torque is required, the extension rod can be combined with a rear end of the wrench to form a longer operating arm of force to meet the requirements of large torque.

Abstract: An anti-rolling socket includes a socket body, a groove, a through hole, and a stopper. The socket body has an inner peripheral surface and an outer peripheral surface. The groove is disposed in, and along the circumference of, the inner peripheral surface. The through hole is disposed between the inner peripheral surface and the outer peripheral surface and communicates with the groove. The stopper includes a stop ring and a stop section. The stop ring is fitted in the groove. The stop section is connected to the stop ring. The stop section projects from the through hole and protrudes from the outer peripheral surface. The stop section can abut against a flat surface to prevent the socket body from rolling on the flat surface.

Abstract: A roller wrench having a body with a circular chamber; a driving member being a regular polygonal component capable of rotating in the chamber; a plurality of rollers installed in the chamber, each of the rollers is located between a side of the driving member and a peripheral wall of the chamber; a reversing knob capable of driving the rollers to move in the chamber so that each of the rollers moves between two edges of each of sides of the driving member; and at least one elastic positioning component installed on one of the sides of the driving member, and capable of elastically moving into the driving member or protruding from a peripheral surface of the driving member. The elastic positioning component is moved into the driving member when being compressed; and is protruded from the driving member when not being acted on by an external force.

Abstract: A detachable fastening device includes a socket, a hollow disk and a positioning mechanism. The socket includes an external mounted base and at least one first depression located at the external mounted base. The hollow disk is detachably connected to the socket and includes an inner engaged wall coordinated with the external mounted base and at least one second depression located at the inner engaged wall. The positioning mechanism is received between the at least one first depression and the at least one second depression to position the socket and the hollow disk.

Abstract: A socket with an engaging structure includes a socket body, an opening, a groove, and a stop ring. The socket body has a central axis. The opening is formed at an end of the socket body. The groove is disposed in, and along the circumference of, the inner side of the socket body. The stop ring is disposed in the groove and includes at least one hollow cavity, at least one inner surface, and an outer surface. The inner surface surrounds the hollow cavity, and the outer surface is farther away from the hollow cavity than is the inner surface. The socket is configured to reduce abrasion between the socket body and a tool member and decrease the difficulty of bringing the tool member into engagement in the socket.

Abstract: A hand tool includes a first driving element, a second driving element and at least one connecting element. The first driving element includes a first driving portion and a first staggered portion. The first driving portion is connected to the first staggered portion integrally. The second driving element does not contact the first driving element and includes a second driving portion and a second staggered portion. The second driving portion is connected to the second staggered portion integrally. The connecting element connects the first staggered portion and the second staggered portion, wherein the connecting element is made of insulating material.

Abstract: A torque wrench with elastic member includes a tubular body in which an elastic member is disposed for adjusting the torque value of the torque wrench. The elastic member is in the form of a plate body having a front connection section, a rear connection section and at least one bent section positioned between the front and rear connection sections. The front and rear connection sections of the elastic member respectively abut against a click mechanism disposed in front of the elastic member and an adjustment mechanism disposed behind the elastic member, whereby the elastic member can be compressed or released to adjust the torque value of the torque wrench. The elastic member has a novel structure and can ensure the stability of the torque wrench in use and enhance the utility of the torque wrench.

Abstract: A driving head structure of a socket wrench includes an assembling base and a joint portion. The assembling base includes a plurality of convex curved surfaces. The joint portion is disposed on the assembling base. The assembling base is cylinder-shaped, and the joint portion is cuboid-shaped. Each of the convex curved surfaces is contacted with each side of the joint portion.

Abstract: A socket structure includes a body, a first fitting hole, a second fitting hole, and at least one elastic engaging member. The first fitting hole is disposed at one end of the body. The second fitting hole is disposed at another end of the body. The at least one elastic engaging member is disposed in the first fitting hole and protrudes toward an inner portion of the first fitting hole along a radial direction of the first fitting hole. When a tool is inserted into the first fitting hole, the at least one elastic engaging member is pressed and deformed by the tool and is thus engaged with the tool. The configuration of the at least one elastic engaging member makes it easier to connect a tool to and remove the tool from the socket structure.

Abstract: A display including a front frame, a rear case, a display panel and a sound emitting device is provided. The display panel is disposed between the front frame and the rear case, and a display surface of the display panel is exposed from the front frame. The sound emitting device is disposed between the front frame and the rear case and includes a sound box, a speaker unit and a sound guide channel. The speaker unit disposed on the sound box has a sound emitting surface facing a first direction. The sound guide channel is extended to the sound emitting surface and has a sound outlet facing a second direction. The first direction is not parallel to the second direction.